Pneumatic paint-brush.



J. A. PAASCHE.

PNEUMATIG PAINT BRUSH. n

APPLICATION IILLDl APB.. 11, 1910.

Patented Ju1y21, 1914 z sHBBTsfs'HBBT 1.

J. A. PAj-ASGHE. Y PNEUMATIoJmmT BRUSH.

- APPLICATION FILED APB-11. 1910.\

' Patented July 21, 1914 2 SHEETS-SHEET 2.

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UNITED sTATEs .PATENT onirica.

.mns A., PAAscHE, or CHICAGO, ILLINOIS.`

PNEUMATIC PAINT-BRUSH'.

Specification of Letters Patent.

Patented July 21, 1914.

Application led April 11, 1910. Serial No. 554,669. Y

'To all whom t mal concern Be it known t at I, JENS A. PAAscBLE, a citizen ofthe United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Pneumatic Paint- Brushes, of which the following is a specication.

This invention relates to a pneumatic brush which is especially adapted for use with paint of heavier consistency than'that used with the common air brush, such as house paints, varnlshes, enamels, etc.; al-

. though the brush is not limited to'such use,

Y connection between the. forwardl section and A l-@theuremainder ofthebody; SQIat `15.1.19 (30191'. l ,l -..dbhar means may be positioned at different ang es upon the body. I

'Other objects and advantages will appear from the following detailed description.l -jIn the accompanyln drawingsv Figure 1 is a side elevation o brush embodying the feat res of my invention. Fig. 2 is a vertica central section through the brush. Fig. 3. is an enlar ed t y section of the rear part of the brush ta en upon the same plane as Fig. 2. Fig. 4 is a section on line 4 4 of Fig. 3. Fig. 5`is an enlarged 'fragmental section through the air and color-discharge nozzles. .Fig 6' is an enlarged section on line 6 6 of Fi 2. Figs. 7 and 8 are fragmental detail views of lthepaint-fcedin tube or needle. Fig. 9 is a lfragmental si e elevation illustratlng Athe manner of using av 'igment cup instead' of the bottle shown 1n 1 1.l

In the embodiment of-t e invention which Iy have selected forA the purpose of. illustration, the body 4of the brush' compriseaxabarrel 1 having a `handle2secured thereto, the brush being arranged to held b said handle in the manner'offa pistol. T e' for ward end 3- of the body is tapering,- as shown, and inthe present form/is separate from a pneumatic paint the barrel l, said forward end having a con-A tracted eXteriorly-threaded portion'4 which is arranged to engage theinterior threads 1n one end of the barrel 1. A lock nut 5 upon said contracted portion locks the said parts together. Projectin downwardly from the forward portion o -the body is a lug -6 having an opening 7 therein, in which opening is adjustably mounted a sleeve 8.

` The bottle or other container' 9 for the paintIfnay be of any suitable construction.

A tube 10 extends through th cover 11 for.

the bottle to a point near the ottom of the bottle and preferably near the forward side of the bottle so that when the brush is inclined downwardly the contents of the bottley y may be practically completely discharged.. The tube l0 is arranged to 'fit within the rear end of the sleeve 8. A'set screw 12 screw-threaded in the lug 6, is

,adapted to lock the sleeve 8 againstmovement. 13 is a set screw for locking the tube 10 in the sleeve 8.

Fixed in the forward end of the sleeve 8 is a tube or needle 14. The forward end of the tube 14 is tapered as at 15, the opening through 'said ,tube terminati' at 14" .upon the side lof said tapered portion 15 as shown -in Fi .f7 and 8.' Fitting tightl about the tu e 14, and slidable longitudinally thereupon, isa nozzle 16, the forwardV end of said fnozzle being'finteriorly tapered A'to lit the 4tapered end 15v of the tube 14 and thereby control the discharge of paint from said tube. It will be seen fromFi s. 2 and 7 that the tapered portion 15 is re altively short or blunt, so that the-outlet 14 for the paint is; located close lto the orifice of the nozzle 16. The rear end of the nozzle 16 has a screw-thread connection with the sleeve 8,. sov that the rotation .of the nozzle will movethe same longitudinally along the-- tube 14 and will thus permit more or less paint to be discharged, accordingto the-size of the openingbetween vthe tapered. 4end 15 of the tube and the inner wall ofthe' nozzle tip. 17 isa knurlediiange :on thenozzle 16 by which said nozzle may be -rotated'.

l pon the forward end'of the tapered-por tio-n3 of the .bod is an air lnozzle 18 havin 'a' fla-ring. guard ange 19 .at lits forward-enc An openin'g() is providefd in the flange 19 'the paint nozzle 16 extends so that the'cur- 'rent of air vissuin `from-the air nozzle will draw the' paint t rough the nozzle .16 and thrugn which opening,- the forward end of A y jury.

The rear end of the barrel 1 is closed by a head 21 which carries the pressure iiuidv valve mechanism. Said head has an exteri-l orly-screw-threaded portion 22 which is l turned into the interiorly-threaded end ofv the barrel. In the rear end of the head 21 is formed a recess 23. -A threaded opening 24 extends centrally' through the head from its inner face to the center of the recess 23. A member 25 is arranged to extend into the recess y23 of the head and close said recess, said member having at its forward end a threaded stem 26 which is turned in the opening 24 in the head 21, the stem 26, in this instance, extending entirely through the head. The inner end of the member 25 is somewhat reduced in diameter, as at 27, thus forming an annular chamber 28 between said innerfend and the wall of the recess 23.

A passage 29 extends centrally through the member 25 and is continued 1n a somewhat reduced diameter through the stem 26. An annular shoulder 30 formed in the wall of said passage provides a valve seat against which a valve member-31, having a stem 32, is adaptedto seat, and thereby control the i'low of pressure fluid through said passage. The valve. member 31 is held seated by means of a coiled spring 33 bearing at one end upon said valve member, and at its other end against a hollow plug 34 threaded in the outer end of the passage 29 in the member 25. A valve-operating-stem 35 fits slidably within the forward end of the pas-v sage 29 in the stem 26. Screw threaded upon the rear end of the member 25 is a nipple 36 adapted to have a suitable pressurefluid conductor, such as a rubber hose, attached thereto. A port 37 connects the passage 29 in -front of the valve member 31 with the annulai chamber 28. Another port 38 extends through the head 21 from the annular chamber 28 to the inner face of said head 21. A pipe 39 is threaded at one end in the port 38and at its other end has, in this instance, Va screwthread connection with the air nozzle 18. Said pipe is adapted to convey pressure fluid from the port 38 to the air nozzle 18.

Themeans for unseating the valve 31 to permit the passage of airto the air nozzle 18 comprises, in this instance, a trigger lever 40 extending into an opening 41 in the lower side of the'barrel 1, and pivotally mounted at its upper end by means yof a tapered pin 42 extending through the walls of the barrel and through said end of the lever. It will be understood that the lever is adapted to be operated by the index linger when the operators hand is gripping the handle 2. 40a is a set screw forming an adjustable stop' to limit the opening movement of the lever 40.

A link 43 is pivotally connected at one end with the. trigger lever 40 by means of a pivot pin 44 and at its other endis pivoted to the forward end of the valve operating stem 35.

In applying certain paints, as, for instance, bronzes, itis necessary to agitate the paint to prevent, settling of the pigment. I, therefore, provide means for discharging compressed air into the bottles, one example of which means will next be described.

, A, tube 45, connected at one end in a suitable manner with ,the annular chamber 28, is supported near its other end by a suitable loop or eye upon the barrel 1, and is extended to a point near the bottle 9. 46 is a tube attached to the cap 11 of the bottle and extending to apoint near the bottom of the bottle. The tubes 45 and 46 may be' detachablyv connected by 'a section of flexible tubing 47. ,48 (Fig. 4) is a needlevalve for regu lating the iiow of air through the tube 45.

In order that thebrush may be set in an uprightposition upon a table or other support, I provide a rod 49 which is vertically slidable in the handle 2 and-may be fixed in adjusted position by a set screw 50. In practice, the rod 49 is fixed in such position that its lower end is in the same horizontal. plane as the bottom of the bottle 9, so that when the brush is placed upon a. table it will be supported by thel bottle land the rod 49.`

The reason forrotatably connecting the forward section 3 to the barrel 1 isto permit of substituting a pigment cup 50 for the bottle 9 (see Fig. 9).4 l/Vhen it is desired to use such a lcup instead of a bottle, the section 3 is turned so that the parts 6 and 16 are in thel same horizontal 'plane with the section 3, andthe'latter is secured in such position by means of the lock nut 5. A' cup 50 of the usual form having a tubular attaching stemvv 51 may now be connected to the tubular needle 14 by inserting the end of said stem in the sleeve 8. It will be understood that a Aless powerful air current will be needed to draw paint from a cup supported at approximately the same level las the air air'current than froml a container located below the air current In operation, when the paint nozzle 16 has been adjusted on the tube 14 to the position to permit the flow of the desired amount of paint, the trigger lever 40 is moved rear-V wardly to unseat the valve 31. Air under pressure now travels through the passage 29, port 37, chamber 28, port 38, and through the pipe 39 to the` air nozzle 18 where the air,` draws paint from the container 9, disinte` grates the paint and carries it.- against the article to be' coated.

It will be observed that the outlet for the paint .is relatively large, so lthat heavy nishes such as 'ordinary house paint, japans, lacquers, bronze paintsa etc., can be applied adapted to, convey the paint, the forward 7. In a pneumatic paintbrush, in combi: 130

by'meansof the brush. In practice, it has been' found that paints which are not of smooth* or even. consistency, z'. e., having lumps or 'sediment therein, canbe successfully used with the tool herein shown. Furthermore, the paint outlet 14 of the tube 14 is relatively near to the outlet or orifice of the'nozzle 16, said pai-nt outlet being located in the side of the short or blunt coni-l cal end 15 of the tube 14. Thepaint there- ,fore does not need to travel far from the outlet--14before reaching the orifice of the nozzle- 16, and hence any color remaining in b therefore, I donot limit'myself to the' exact construction herein shown and described.

Certain features of the device herein disclosed are claimed broadly in my co-pending application vSerial N o. 492,013 filed April 24, 1909.

I claim as my invention:

1. In a pneumatic paint brush, in combination, air-discharge means; and co1or-dis-. charge means comprising a sleeve, al tube secured to said sleeve, the forward end yofy said tube beingA tapered and the opening therein terminating upon the surface of said tapered portion, and a nozzle fitting upon the forward end -of said tube. and being internally tapered to fit the forward tapered end of said tube, said nozzle having a conlnection with said sleeve, whereby the nozzle may be moved longitudinally of said tube to control the discharge of color. I

2. Ina pneumatic paint brush, in combination a body; air-discharge; means carried by sai. body; a lug on said body having an opening therein; a sleeve mounted in said lopening; a tube xed in the forward end of said sleeve, the forward end of said tube being tapered andthe opening therein 1terminating upon the surface of said tapered porftion, and a nozzle fitting upon said tube and being internally tapered to t the forward tapered end of said tube, said nozzle having a screw-thread connection with said sleeve, whereby the nozzle maybe moved longitudinally of said tube to control the discharge of color.

3. In a pneumaticpaint brush, in combination, pressure-iluid-discharge means; and paint-dischargel means comprising a tube end of said tube being tapered bluntly, the' opening in said tube being relatively large and terminating upon the face of said ta-l pered portion, and a nozzle tting tightl upon said tube and being interiorly tapere to fit-the forward tapered end of said tube, said nozzle and said tube being slidable with relation to each other to' control the discharge of paint. A -p 4. In 'a pneumatic paint brush, in combination, a body comprising a barrel; color'- discharge meansat the forward end of the ody; an air nozzle adjacent to saidcolor discharge means; a head closing the rear end of said barrel, said head havinga recess in its outer face and having a port connecting said recesswithpthe inner face of said head; a pipe in said barrel connecting the inner end of said port with said air nozzle; a member closing said recess, said member having an air passage therein communicating at its inner end with said recess; a valve in said passage .for controlling the flow-of air therethrough; a valve-operating stem slidable in said member and eX- tending into the rear end of said barrel; a finger lever extending into and pivoted in said barrel; and. a link within'said barrel connecting said iingei` leverwith the inner end of sald valve-operating stem.

v 5.A In a pneumatic paint brush, in combination, a body comprising, a barrel, colorv discharge means at the forward end of the body,.an air nozzle adjacent to said color discharge means,l a head'- closing the rear'end 'of said barrel,l said head having a recess in its outer face and having a vcentral screw threaded opening extending from said recess to the inner side of said head, said head having a port connecting said recess with the inner face of said head, a pipe within said barrel connectingthe inner end ofv said port with said air nozzle, a vmember closing the recess in said head and having astem threadedin said central opening, said member having a. passage thereinr communicating at its inner end `with said recess, a valve .1n .said passage for controlling the flow of air therethrough, a valve operating stem slidable in the first mentioned stem and extending into the rear end of said barrel, and a finger leverv adapted to slide said stem.' to open said valve. y l

'6.' Ina pneumatic paint brush, in combination, a body, a'forward section adjustably connected therewith and havinga lu there'- on, color discharge means carried. iiy said lug, said forward section being movable into position with said llug extending downwardly for attachment to a paint bottle or extending'- laterally `for attachment with a pigment cup, and means for locking said section to said tions.`

body in either of said posiy tion being rotatable to change the position' of said paint-discharge means with reference to said barrel, whereby either a paint bottle or an open` paint cup may be used in' connection with said` paint discharge means -and ajam nut for locking said section to said barrel in adjusted positions.

8. In a pneumatic paint brush, in combination, an elongated body, an air nozzle at the forward end of said body, a downwardly projecting lug adjacent to the forward end of said body, paint discharge meansmounted in said lug, a paint bottle dependin from said lug, a downwardly projecting andle secured to the rear portion of said body, by which handle the'device may beheld in the hand like a pistol,a head carried at the rear end of saidbody and having a recess therein, a. valve controlling the flow of pressure uid into said recess, a pipe within said body connecting said recess with the air nozzle, a second pipe leading from said recess to said paint bottle, and a downwardly projecting trigger lever mountedin the body forwardly of said handlev and operatively connected with said valve.

9. .A pneumatic paint. brush comprising a tube tapered bluntly at one end and having a relatively large longitudinal opening ideaal? end of said tube to control a discharge of paint therefrom.

l0. A pneumatic paintbrush comprising a tubular paint conductor having a tapered forward end and having a longitudinal opening terminating on thetapered surface, and a nozzle surrounding said conductor and being interiorly tapered to it against ,said

forwardendland thus close the end of said opening, said nozzle having a` screw thread connection with said conductor.

' 11. In a pneumatic paint brush, air-discharge ,means, and paint discharge means comprising a sleeve having a passage therethrough, a color receptacle having a conduit extending into one end-of said passage, a

tube secured to .said sleeve and communicating with the opposite end of said passage the forward end of said tube being tapered and the opening in the tube terminating upon the tapered surface, and a nozzle surrounding said tube and controlling the discharge of paint therefrom, said nozzle having a screw thread .connection with said sleeve,

JENS A. PAASCHE. Witnesses:

J. T. FORTIN, y C. H. STURNrmLD. 

